No matter how much they know about the odds against a long career, few players enter the NFL thinking they will only last one year. But Packers running back Johnathan Franklin will not make it to a second season, for one of the worst of reasons.

Franklin, Green Bay's fourth-round pick last year from UCLA, confirmed on his Twitter account that his career is over due to a neck injury sustained on a kickoff return against the Vikings in November.

Earlier, Packers coach Mike McCarthy told reporters at the end of their minicamp practice (according to the Green Bay Press Gazette) that "all the information has come in" on Franklin's recovery, and that "he will not be back with us." McCarthy added that more information would come on Friday.

On Wednesday, ESPN.com reported that Franklin had been put through more tests by the Packers this week to determine the severity of his injury. He had missed all of the team's OTAs and this week's minicamp.

Franklin ran for 103 yards and a touchdown against the Bengals last September, filling in for fellow rookie Eddie Lacy, who missed the game with a concussion. Otherwise, he played mostly special teams, and the Packers had high hopes for his future. Instead, he suffered the neck injury and concussion and went on injured reserve for the final six weeks.